CN114133256A - Ceramic crucible matched with intermediate frequency furnace and preparation method thereof - Google Patents
Ceramic crucible matched with intermediate frequency furnace and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a ceramic crucible matched with an intermediate frequency furnace and a preparation method thereof2And Al2O3Therefore, the alloy can not react with molten steel in the casting using process, and can not separate out harmful free substances, thereby avoiding the risks of pollution or slag inclusion, air holes and the like of castings. In addition, the fused quartz is a substance with a thermal expansion coefficient of almost 0, has extremely low volume change rate and extremely high thermal shock resistance, ensures the smooth casting on the basis of meeting the use strength, and can greatly improve the performance and the production efficiency of the high-temperature alloy precision casting.
Description
Technical Field
The invention relates to the technical field of ceramic crucible preparation, in particular to a ceramic crucible matched with an intermediate frequency furnace and a preparation method thereof.
Background
With the development of the casting industry, the medium frequency induction furnace has been widely applied to the melting of metals and alloys in the fields of materials and metallurgy due to the advantages of high melting speed, uniform components, high temperature, simple operation process, small environmental pollution and the like, a matched crucible is also one of important components for casting of the medium frequency induction furnace, the quality of the crucible has a crucial influence on the quality of a casting, and the crucible is required to have enough refractoriness, small volume change, good thermal shock resistance, good chemical stability, no molten steel pollution and enough sintering strength to resist mechanical impact and slag corrosion.
At present, domestic related crucible products mainly use ramming material crucibles, and the crucibles have the problems of poor thermal shock resistance, liquid steel pollution, impurity rejection of components and the like, so that the defects of pollution, slag inclusion, air holes and the like are easily caused to precision castings.
Therefore, how to develop a novel ceramic crucible to solve the above problems is a problem to be solved.
Disclosure of Invention
In view of the above, the invention provides a ceramic crucible matched with an intermediate frequency furnace and a preparation method thereof, which are used for solving the problems of poor thermal shock resistance, molten steel pollution, impurity rejection of components and the like of the conventional crucible and easily causing the defects of pollution, slag inclusion, air holes and the like on precision castings.
In one aspect, the invention provides a ceramic crucible matched with an intermediate frequency furnace, which is prepared from the following raw materials in parts by weight: 20-50 parts of fused quartz powder, 0-30 parts of white corundum powder, 26-30 parts of alpha-alumina powder, 18-28 parts of gamma-alumina powder, 2-4 parts of white carbon black, 0.2-0.8 part of boric acid, 0.6-1.25 parts of sodium polyacrylate, 0.6-1.25 parts of silane coupling agent and 8-10 parts of silica sol.
On the other hand, the invention also provides a preparation method of the ceramic crucible matched with the intermediate frequency furnace, which comprises the following steps:
a) mixing main materials: taking 20-50 parts by weight of fused quartz powder, 0-30 parts by weight of white corundum powder, 26-30 parts by weight of alpha-alumina powder, 18-28 parts by weight of gamma-alumina powder and 2-4 parts by weight of white carbon black, feeding the raw materials into a gravity-free mixing device, and uniformly mixing the raw materials for later use;
b) and (3) mixing auxiliary materials: taking 0.2-0.8 part of boric acid, 0.6-1.25 parts of sodium polyacrylate, 0.6-1.25 parts of silane coupling agent and 8-10 parts of silica sol by weight, and sending the mixture into a stirrer to fully dissolve other auxiliary materials in the silica sol for later use;
c) mixing main materials and auxiliary materials: feeding the uniformly mixed main materials into a stirrer, uniformly dividing the fully dissolved auxiliary materials into 2 parts, sequentially pouring the uniformly dissolved auxiliary materials into the stirrer, and fully and uniformly stirring to form slurry for later use;
d) and (3) vacuum stirring for bubble removal: feeding the slurry into a vacuum stirrer, starting vacuum stirring, removing bubbles in the slurry, and sealing for storage for later use;
e) and (3) treatment of the silica gel mold: uniformly coating dimethyl silicone oil on the surface of the cavity of the silica gel mold, and then uniformly spraying a layer of ammonium chloride solution on the surface of the dimethyl silicone oil for later use;
f) casting and molding a crucible: pouring the slurry subjected to vacuum defoaming into a cavity of the treated silica gel mold, and placing the poured silica gel mold on a vibration platform for vibration;
g) demolding and drying: after the slurry is hardened, removing the outer sleeve and the inner core of the mold to obtain a crucible blank, and drying the crucible blank in a constant-temperature constant-humidity oven;
h) sintering the crucible: and (4) sending the dried ceramic crucible blank into a kiln, and sintering to obtain the finished ceramic crucible.
Preferably, the particle size of the fused quartz powder is 20-120 meshes, the particle size of the white corundum powder is 120-350 meshes, the particle size of the alpha-alumina powder is less than 325 meshes, and the particle size of the gamma-alumina powder is 30 microns.
More preferably, in step b), the polymerization degree of the sodium polyacrylate is 500 type, and the SiO of the silica sol is2The content is 20%.
Further preferably, in the mixing process of the main materials and the auxiliary materials in the step c), after the first part of the auxiliary materials are added, the mixture is stirred for 3 to 6 minutes, then the second part of the auxiliary materials are added, and the stirring is carried out for 10 to 15 minutes.
Further preferably, in the step d), during the vacuum stirring and defoaming, the vacuum degree of the vacuum stirrer is-0.09 Mpa, and the vacuum defoaming time is 15-30 minutes.
More preferably, in step e), the ammonium chloride solution has a mass concentration of 10%.
Preferably, in the step f), firstly, high-frequency vibration is used, the vibration time is 3-5 minutes, then low-frequency vibration is adopted, the vibration time is 5-10 minutes, and after the vibration is finished, the pouring gate of the mold is sealed by a preservative film.
Further preferably, after the crucible is demolded in the step g), the drying process is that firstly the air humidity is 50% and the drying time is 3-5 hours, and then the air humidity is 10% and the drying time is 5-7 hours.
Further preferably, the sintering temperature of the crucible in step h) is 600-.
The ceramic crucible matched with the intermediate frequency furnace provided by the invention has stable chemical property, and the main component is only SiO2And Al2O3Therefore, the alloy can not react with molten steel in the casting using process, and can not separate out harmful free substances, thereby avoiding the risks of pollution or slag inclusion, air holes and the like of castings. In addition, the fused quartz is a substance with a thermal expansion coefficient of almost 0, has extremely low volume change rate and extremely high thermal shock resistance, ensures the smooth casting on the basis of meeting the use strength, and can greatly improve the performance and the production efficiency of the high-temperature alloy precision casting.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a photograph of a ceramic crucible for an intermediate frequency furnace prepared according to the present invention;
FIG. 2 is an X-ray diffraction pattern of a ceramic crucible for an intermediate frequency furnace prepared in the disclosed example 1;
FIG. 3 is a scanning electron microscope atlas of a ceramic crucible for an intermediate frequency furnace prepared in example 1 of the present disclosure.
Detailed Description
The present invention is further illustrated by the following specific examples, which are not intended to limit the scope of the invention.
Example 1
The preparation method of the ceramic crucible matched with the intermediate frequency furnace comprises the following specific steps:
a) mixing main materials: taking 40 parts of 120-350-mesh fused quartz powder, 10 parts of 120-350-mesh white corundum powder, 30 parts of alpha-alumina powder below 325 meshes, 28 parts of gamma-alumina powder with the particle size of 30 mu m and 2 parts of white carbon black by weight, feeding the raw materials into a gravity-free mixing device, and uniformly mixing the raw materials for 15 minutes for later use;
b) and (3) mixing auxiliary materials: taking 0.2 part of boric acid, 0.6 part of sodium polyacrylate, 1.25 parts of silane coupling agent (KH-570) and 8 parts of silica sol by weight, and feeding the mixture into a stirrer to stir for 3 minutes for later use;
c) mixing main materials and auxiliary materials: feeding the fully mixed main material into a stirrer, uniformly dividing the fully dissolved auxiliary material into 2 parts, firstly pouring the first part of auxiliary material and stirring for 3 minutes, and then pouring the second part of auxiliary material and stirring for 10 minutes for later use;
d) and (3) vacuum stirring for bubble removal: feeding the slurry into a vacuum stirrer, starting vacuum stirring, continuing stirring for 15 minutes after the vacuum degree reaches-0.09 Mpa, and sealing and storing for later use;
e) opening a silica gel mold: the mould is made of silicone rubber with the Shore hardness of 36A, the structure is divided into an inner core and an outer sleeve, a cavity is arranged between the inner core and the outer sleeve, a casting opening communicated with the cavity is arranged on the outer sleeve, the silicone rubber of the mould is used for casting the silicone rubber into the structure, and the silicone rubber is used after being fully dried;
f) and (3) treatment of the silica gel mold: uniformly coating dimethyl silicone oil on the surface of the dried cavity of the silica gel mold, and then uniformly spraying a layer of ammonium chloride solution with the mass part of 10% on the surface of the dimethyl silicone oil for later use;
g) casting and molding a crucible: pouring the slurry subjected to vacuum defoaming into a cavity of a treated silica gel mold, simultaneously placing the poured silica gel mold on a vibration platform, starting vibration, firstly using high-frequency vibration for 5 minutes, then converting into low-frequency vibration for 10 minutes, and sealing a pouring gate of the mold by using a preservative film after the vibration is finished;
h) demolding and drying: and after the slurry is hardened, removing the outer sleeve and the inner core of the mold to obtain a crucible blank. Sending the crucible blank into a constant-temperature constant-humidity oven for drying, firstly reducing the air humidity to 10% when the air humidity is 50% and the drying time is 3 hours, and continuously drying for 5 hours;
i) sintering the crucible: and (3) conveying the dried ceramic crucible blank into a kiln, and sintering at the high temperature of 850 ℃ to obtain a finished crucible, as shown in figure 1.
Example 2
The preparation method of the ceramic crucible matched with the intermediate frequency furnace comprises the following specific steps:
a) mixing main materials: taking 50 parts by weight of 120-350-mesh fused quartz powder, 0 part by weight of 120-350-mesh white corundum powder, 28 parts by weight of alpha-alumina powder below 325 meshes, 18 parts by weight of gamma-alumina powder with the particle size of 30 mu m and 4 parts by weight of white carbon black, feeding the raw materials into a gravity-free mixing device, and uniformly mixing the raw materials for 10 minutes for later use;
b) and (3) mixing auxiliary materials: taking 0.4 part of boric acid, 1 part of sodium polyacrylate, 1 part of silane coupling agent (KH-570) and 10 parts of silica sol according to the weight of the main materials, and feeding the mixture into a stirrer to stir for 5 minutes for later use;
c) mixing main materials and auxiliary materials: feeding the fully mixed main material into a stirrer, uniformly dividing the fully dissolved auxiliary material into 2 parts, firstly pouring the first part of auxiliary material and stirring for 4 minutes, and then pouring the second part of auxiliary material and stirring for 12 minutes for later use;
d) and (3) vacuum stirring for bubble removal: feeding the slurry into a vacuum stirrer, starting vacuum stirring, continuing stirring for 12 minutes when the vacuum degree reaches-0.09 Mpa, and sealing and storing for later use;
e) opening a silica gel mold: the mould is made of silicone rubber with the Shore hardness of 36A, the structure is divided into an inner core and an outer sleeve, a cavity is arranged between the inner core and the outer sleeve, a casting opening communicated with the cavity is arranged on the outer sleeve, the silicone rubber of the mould is used for casting the silicone rubber into the structure, and the silicone rubber is used after being fully dried;
f) and (3) treatment of the silica gel mold: uniformly coating dimethyl silicone oil on the surface of the dried cavity of the silica gel mold, and then uniformly spraying a layer of ammonium chloride solution with the mass part of 10% on the surface of the dimethyl silicone oil for later use;
g) casting and molding a crucible: pouring the slurry subjected to vacuum defoaming into a cavity of a treated silica gel mold, simultaneously placing the poured silica gel mold on a vibration platform, starting vibration, firstly using high-frequency vibration for 3 minutes, then converting into low-frequency vibration for 5 minutes, and sealing a pouring gate of the mold by using a preservative film after the vibration is finished;
h) demolding and drying: and after the slurry is hardened, removing the outer sleeve and the inner core of the mold to obtain a crucible blank. Sending the crucible blank into a constant-temperature constant-humidity oven for drying, firstly reducing the air humidity to 10% when the air humidity is 50% and the drying time is 4 hours, and continuously drying for 6 hours;
i) sintering the crucible: and (4) sending the dried ceramic crucible blank into a kiln, and sintering at the high temperature of 750 ℃ to obtain the finished crucible.
Example 3
The preparation method of the ceramic crucible matched with the intermediate frequency furnace comprises the following specific steps:
a) mixing main materials: taking 20 parts of 120-350-mesh fused quartz powder, 30 parts of 120-350-mesh white corundum powder, 28 parts of alpha-alumina powder below 325 meshes, 20 parts of gamma-alumina powder with the particle size of 30 mu m and 2 parts of white carbon black by weight, feeding the raw materials into a gravity-free mixing device, and uniformly mixing the raw materials for 20 minutes for later use;
b) and (3) mixing auxiliary materials: taking 0.6 part of boric acid, 1.25 parts of sodium polyacrylate, 0.6 part of silane coupling agent (KH-570) and 10 parts of silica sol by weight, and feeding the mixture into a stirrer to stir for 5 minutes for later use;
c) mixing main materials and auxiliary materials: feeding the fully mixed main material into a stirrer, uniformly dividing the fully dissolved auxiliary material into 2 parts, firstly pouring the first part of auxiliary material and stirring for 5 minutes, and then pouring the second part of auxiliary material and stirring for 12 minutes for later use;
d) and (3) vacuum stirring for bubble removal: feeding the slurry into a vacuum stirrer, starting vacuum stirring, continuing stirring for 12 minutes when the vacuum degree reaches-0.09 Mpa, and sealing and storing for later use;
e) opening a silica gel mold: the mould is made of silicone rubber with the Shore hardness of 36A, the structure is divided into an inner core and an outer sleeve, a cavity is arranged between the inner core and the outer sleeve, a casting opening communicated with the cavity is arranged on the outer sleeve, the silicone rubber of the mould is used for casting the silicone rubber into the structure, and the silicone rubber is used after being fully dried;
f) and (3) treatment of the silica gel mold: uniformly coating dimethyl silicone oil on the surface of the dried cavity of the silica gel mold, and then uniformly spraying a layer of ammonium chloride solution with the mass part of 10% on the surface of the dimethyl silicone oil for later use;
g) casting and molding a crucible: pouring the slurry subjected to vacuum defoaming into a cavity of a treated silica gel mold, simultaneously placing the poured silica gel mold on a vibration platform, starting vibration, firstly using high-frequency vibration for 3 minutes, then converting into low-frequency vibration for 5 minutes, and sealing a pouring gate of the mold by using a preservative film after the vibration is finished;
h) demolding and drying: and after the slurry is hardened, removing the outer sleeve and the inner core of the mold to obtain a crucible blank. Sending the crucible blank into a constant-temperature constant-humidity oven for drying, firstly reducing the air humidity to 10% when the air humidity is 50% and the drying time is 5 hours, and continuously drying for 7 hours;
i) sintering the crucible: and (4) sending the dried ceramic crucible blank into a kiln, and sintering at the high temperature of 700 ℃ to obtain the finished crucible.
Example 4
The preparation method of the ceramic crucible matched with the intermediate frequency furnace comprises the following specific steps:
a) mixing main materials: taking 30 parts of 120-350-mesh fused quartz powder, 20 parts of 120-350-mesh white corundum powder, 26 parts of alpha-alumina powder below 325 meshes, 20 parts of gamma-alumina powder with the particle size of 30 mu m and 4 parts of white carbon black by weight, feeding the raw materials into a gravity-free mixing device, and uniformly mixing the raw materials for 30 minutes for later use;
b) and (3) mixing auxiliary materials: taking 0.8 part of boric acid, 1 part of sodium polyacrylate, 1 part of silane coupling agent (KH-570) and 8 parts of silica sol according to the weight of the main materials, and feeding the mixture into a stirrer to stir for 3 minutes for later use;
c) mixing main materials and auxiliary materials: feeding the fully mixed main material into a stirrer, uniformly dividing the fully dissolved auxiliary material into 2 parts, firstly pouring the first part of auxiliary material and stirring for 6 minutes, and then pouring the second part of auxiliary material and stirring for 12 minutes for later use;
d) and (3) vacuum stirring for bubble removal: feeding the slurry into a vacuum stirrer, starting vacuum stirring, continuing stirring for 15 minutes after the vacuum degree reaches-0.09 Mpa, and sealing and storing for later use;
e) opening a silica gel mold: the mould is made of silicone rubber with the Shore hardness of 36A, the structure is divided into an inner core and an outer sleeve, a cavity is arranged between the inner core and the outer sleeve, a casting opening communicated with the cavity is arranged on the outer sleeve, the silicone rubber of the mould is used for casting the silicone rubber into the structure, and the silicone rubber is used after being fully dried;
f) and (3) treatment of the silica gel mold: uniformly coating dimethyl silicone oil on the surface of the dried cavity of the silica gel mold, and then uniformly spraying a layer of ammonium chloride solution with the mass part of 10% on the surface of the dimethyl silicone oil for later use;
g) casting and molding a crucible: pouring the slurry subjected to vacuum defoaming into a cavity of a treated silica gel mold, simultaneously placing the poured silica gel mold on a vibration platform, starting vibration, firstly using high-frequency vibration for 5 minutes, then converting into low-frequency vibration for 3 minutes, and sealing a pouring gate of the mold by using a preservative film after the vibration is finished;
h) demolding and drying: and after the slurry is hardened, removing the outer sleeve and the inner core of the mold to obtain a crucible blank. Sending the crucible blank into a constant-temperature constant-humidity oven for drying, firstly reducing the air humidity to 10% when the air humidity is 50% and the drying time is 3 hours, and continuously drying for 5 hours;
i) sintering the crucible: and (3) sending the dried ceramic crucible blank into a kiln, and sintering at the high temperature of 600 ℃ to obtain the finished crucible.
Example 5
The products prepared in examples 1 to 4 and the existing products are respectively subjected to performance detection, and specific detection results are shown in the following table:
performance test meter
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It is to be understood that the present invention is not limited to what has been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. The ceramic crucible matched with the intermediate frequency furnace is characterized by being prepared from the following raw materials in parts by weight: 20-50 parts of fused quartz powder, 0-30 parts of white corundum powder, 26-30 parts of alpha-alumina powder, 18-28 parts of gamma-alumina powder, 2-4 parts of white carbon black, 0.2-0.8 part of boric acid, 0.6-1.25 parts of sodium polyacrylate, 0.6-1.25 parts of silane coupling agent and 8-10 parts of silica sol.
2. A preparation method of a ceramic crucible matched with an intermediate frequency furnace is characterized by comprising the following steps:
a) mixing main materials: taking 20-50 parts by weight of fused quartz powder, 0-30 parts by weight of white corundum powder, 26-30 parts by weight of alpha-alumina powder, 18-28 parts by weight of gamma-alumina powder and 2-4 parts by weight of white carbon black, feeding the raw materials into a gravity-free mixing device, and uniformly mixing the raw materials for later use;
b) and (3) mixing auxiliary materials: taking 0.2-0.8 part of boric acid, 0.6-1.25 parts of sodium polyacrylate, 0.6-1.25 parts of silane coupling agent and 8-10 parts of silica sol by weight, and sending the mixture into a stirrer to fully dissolve other auxiliary materials in the silica sol for later use;
c) mixing main materials and auxiliary materials: feeding the uniformly mixed main materials into a stirrer, uniformly dividing the fully dissolved auxiliary materials into 2 parts, sequentially pouring the uniformly dissolved auxiliary materials into the stirrer, and fully and uniformly stirring to form slurry for later use;
d) and (3) vacuum stirring for bubble removal: feeding the slurry into a vacuum stirrer, starting vacuum stirring, removing bubbles in the slurry, and sealing for storage for later use;
e) and (3) treatment of the silica gel mold: uniformly coating dimethyl silicone oil on the surface of the cavity of the silica gel mold, and then uniformly spraying a layer of ammonium chloride solution on the surface of the dimethyl silicone oil for later use;
f) casting and molding a crucible: pouring the slurry subjected to vacuum defoaming into a cavity of the treated silica gel mold, and placing the poured silica gel mold on a vibration platform for vibration;
g) demolding and drying: after the slurry is hardened, removing the outer sleeve and the inner core of the mold to obtain a crucible blank, and drying the crucible blank in a constant-temperature constant-humidity oven;
h) sintering the crucible: and (4) sending the dried ceramic crucible blank into a kiln, and sintering to obtain the finished ceramic crucible.
3. The method for preparing the ceramic crucible matched with the intermediate frequency furnace according to claim 2, wherein in the step a), the particle size of the fused quartz powder is 20-120 meshes, the particle size of the white corundum powder is 120-350 meshes, the particle size of the alpha-alumina powder is less than 325 meshes, and the particle size of the gamma-alumina powder is 30 μm.
4. The method for preparing the ceramic crucible matched with the intermediate frequency furnace as claimed in claim 2, wherein in the step b), the polymerization degree of the sodium polyacrylate is 500 type, and SiO of the silica sol is2The content is 20%.
5. The method for preparing the ceramic crucible matched with the intermediate frequency furnace as claimed in claim 2, wherein in the step c) of mixing the main material and the auxiliary material, after the first part of the auxiliary material is added, the mixture is stirred for 3-6 minutes, and then the second part of the auxiliary material is added and stirred for 10-15 minutes.
6. The method for preparing the ceramic crucible matched with the intermediate frequency furnace as claimed in claim 2, wherein in the step d), the vacuum degree of a vacuum stirrer is-0.09 Mpa, and the vacuum defoaming time is 15-30 minutes.
7. The method for preparing the ceramic crucible matched with the intermediate frequency furnace as claimed in claim 2, wherein in the step e), the mass concentration of the ammonium chloride solution is 10%.
8. The method for preparing the ceramic crucible matched with the intermediate frequency furnace as claimed in claim 2, wherein in the step f), high-frequency vibration is firstly used, the vibration time is 3-5 minutes, then the low-frequency vibration is converted, the vibration time is 5-10 minutes, and after the vibration is finished, a pouring port of the mold is sealed by a preservative film.
9. The method for preparing the ceramic crucible matched with the intermediate frequency furnace as claimed in claim 2, wherein after the crucible is demoulded in the step g), the drying process is that firstly the air humidity is 50%, the drying time is 3-5 hours, and then the air humidity is 10%, and the drying time is 5-7 hours.
10. The method for preparing the ceramic crucible matched with the intermediate frequency furnace as claimed in claim 2, wherein the sintering temperature of the crucible in the step h) is 600-850 ℃.
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| CN115959930A (en) * | 2022-12-16 | 2023-04-14 | 辽宁省轻工科学研究院有限公司 | Surface coating of silicon-aluminum ceramic crucible and preparation method thereof |
| CN115959930B (en) * | 2022-12-16 | 2024-05-10 | 辽宁省轻工科学研究院有限公司 | Surface coating of silicon-aluminum ceramic crucible and preparation method thereof |
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| CN102639458A (en) * | 2009-11-30 | 2012-08-15 | 康宁股份有限公司 | Low thermal expansion doped fused silica crucibles |
| CN102153272A (en) * | 2010-12-21 | 2011-08-17 | 弘元新材料无锡有限公司 | Technique for preparing high-compactness quartz ceramic crucible |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115959930A (en) * | 2022-12-16 | 2023-04-14 | 辽宁省轻工科学研究院有限公司 | Surface coating of silicon-aluminum ceramic crucible and preparation method thereof |
| CN115959930B (en) * | 2022-12-16 | 2024-05-10 | 辽宁省轻工科学研究院有限公司 | Surface coating of silicon-aluminum ceramic crucible and preparation method thereof |
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| CN114133256B (en) | 2023-02-24 |
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